CSV export throws an exception

[bernd]

When searching for messages and klicking on Export -> Download CSV, I'm getting an empty file for download and the following error shows up in the server log.

2015-01-19 20:01:06,004 ERROR: org.glassfish.jersey.message.internal.WriterInterceptorExecutor - MessageBodyWriter not found for media type=text/csv; charset=utf-8, type=class org.graylog2.indexer.results.ScrollResult$ScrollChunk, genericType=class org.graylog2.indexer.results.ScrollResult$ScrollChunk.
Exception in thread "Thread-9" org.glassfish.jersey.message.internal.MessageBodyProviderNotFoundException: MessageBodyWriter not found for media type=text/csv; charset=utf-8, type=class org.graylog2.indexer.results.ScrollResult$ScrollChunk, genericType=class org.graylog2.indexer.results.ScrollResult$ScrollChunk.
    at org.glassfish.jersey.message.internal.WriterInterceptorExecutor$TerminalWriterInterceptor.aroundWriteTo(WriterInterceptorExecutor.java:247)
    at org.glassfish.jersey.message.internal.WriterInterceptorExecutor.proceed(WriterInterceptorExecutor.java:162)
    at org.glassfish.jersey.message.internal.MessageBodyFactory.writeTo(MessageBodyFactory.java:1154)
    at org.glassfish.jersey.server.ChunkedOutput$1.call(ChunkedOutput.java:219)
    at org.glassfish.jersey.server.ChunkedOutput$1.call(ChunkedOutput.java:190)
    at org.glassfish.jersey.internal.Errors.process(Errors.java:315)
    at org.glassfish.jersey.internal.Errors.process(Errors.java:242)
    at org.glassfish.jersey.process.internal.RequestScope.runInScope(RequestScope.java:347)
    at org.glassfish.jersey.server.ChunkedOutput.flushQueue(ChunkedOutput.java:190)
    at org.glassfish.jersey.server.ChunkedOutput.write(ChunkedOutput.java:180)
    at org.graylog2.rest.resources.search.SearchResource$1.run(SearchResource.java:276)
    at java.lang.Thread.run(Thread.java:745)